Online Parts Store › Flat Washer, 5/16", .062" Thick, OD 7/8" Image 1 of 1 Flat Washer, 5/16", .062" Thick, OD 7/8" $52.44 Hot Dipped Galvanized. Add To Cart Added! Hot Dipped Galvanized. You Might Also Like Phillips Tapping Screw - Truss Head #10 x 1-1/4" $50.76 Phillips Tapping Screws - Flat Head, #6 x 1/2" $9.26 Phillips Tapping Screws - Flat Head, #14 x 3/4" $44.09 Stainless Cotter Pin $169.61 Phillips Tapping Screws - Oval Head, #12 x 1-1/4" $22.30